The exchange won't say who the buyers and sellers were, nor could it explain the price discrepancy.

FORBES: Hot Seats

Users with a price discrepancy have the option to recycle or to have their electronics shipped back.

WSJ: Finding a Market for Your Old Electronics

An example of the discrepancy can be seen in the price of a 16GB WiFi iPad with Retina Display.

FORBES: Australia To Grill Apple And Microsoft Over Price Gouging